Crosstar M35 Cobalt Drill Bit Set - 21pc TiAlN Coated, 3-Flute, 1/16 to 1/2 Inch for Hardened Metal

When you work with hardened metals, you need tools that withstand heat, maintain precision, and handle high torque. The Crosstar M35 Cobalt Drill Bit Set delivers a complete solution with 21 pieces built from M35 cobalt steel and TiAlN coatings, designed for demanding metalworking tasks.

Key benefits at a glance

• Premium M35 cobalt steel (5% cobalt) targets tough materials such as stainless steel, hardened cast iron, high-carbon steel, and titanium alloys, with effective drilling hardness up to 60 HRC.
• TiAlN coating resists cutting heat up to 1472°F (800°C), reducing friction and extending tool life compared to standard coatings.
• Triple-flute design delivers smoother hole finishes, faster chip ejection by about 40%, and improved drilling accuracy with reduced bit walk.
• Three-flat shank ensures a secure chuck grip and zero slip under high torque, for safer operation.
• Comprehensive 21-piece set spans from 1/16" to 1/2", covering most common metal drilling tasks in one kit.

Design notes that matter

• Two-flute bits (1/16"–7/64") offer delicate control for small holes, while sizes 3/32" and up use the triple-flute design for heavier holes.
• Three-flat shanks maximize power transfer and minimize bit walk in impact drivers and heavy-duty drills.
• Suitable for stainless steel, hardened steel, and other demanding alloys without relying on high-risk or exotic tooling.

Practical usage ideas and setup tips help you get the most from this kit without overdoing it. The set is intended for standard depth of cut applications and works with common drill chucks. For best results, maintain a steady feed pace and consider light lubrication to manage heat buildup.

What's included

• 21-piece assortment ranging from fine 1/16" to heavy 1/2" bits, ready for a variety of metal drilling tasks.